Key result
ST segment depression at peak exercise (mean 93.4% HRmax) was significantly different from that at the traditional 85% HRmax cut-off in male competitive athletes (P<0.0001).
Why the study?
Does evaluating exercise tests at >85% of age-predicted maximal heart rate improve the detection of myocardial ischemia in competitive athletes?
Comparison
ECG traces at 85% of HRmax vs traces at significant ST depression (%HRmaxST)
Design
Observational study
Authors
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May support revising 85% HRmax cutoff in athletes; leaves open prospective validation for CAD detection.
Observational (n=42)
Does evaluating exercise tests at >85% of age-predicted maximal heart rate improve the detection of myocardial ischemia in competitive athletes?
p-value: p=<0.0001
The standard 85% age-predicted maximal heart rate cut-off during exercise testing is insufficient to detect myocardial ischemia in competitive athletes, who may require reaching >93% HRmax to show significant ST depression.
Bosio et al. (2020) conducted an observational in Myocardial ischemia (n=42). Exercise testing at peak effort (%HRmaxST) vs. Exercise testing at 85% HRmax was evaluated on ST segment depression on precordial leads (p=<0.0001). ST segment depression at peak exercise (mean 93.4% HRmax) was significantly different from that at the traditional 85% HRmax cut-off in male competitive athletes (P<0.0001).
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